Abstract
Perovskite-type strontium stannate, SrSnO3, is of technological interest because of its potential applications. In the present work, Fe(III)-doped SrSnO3 perovskites were synthesized using Sn metal and the polymeric precursor method, derived from the Pechini method. Thermogravimetric evaluations in N2 and O2 atmospheres were performed to evaluate the possible formation of oxygen vacancies resulting from Fe(III) doping. The X-ray diffraction patterns showed the formation of an orthorhombic structure with high crystallinity after calcination at 1,073 K. The first thermal analysis, in a N2 atmosphere, led to the partial elimination of strontium carbonate and hydroxyl groups, while the thermal analysis in an O2 atmosphere led to an increase in the mass, indicating O2 adsorption on the lattice, which could be related to the presence of Fe(III) and Fe(IV) in the perovskite structure. Moreover, the thermal analysis changed the symmetry of the iron-doped perovskites.
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The authors acknowledge RECAM/CNPq/MCT, INCT/CNPq/MCT, and PROINFRA/FINEP/MCT for financial support.
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Lucena, G.L., Maia, A.S., Souza, A.G. et al. Structural changes in Fe-doped SrSnO3 perovskites during thermal analysis. J Therm Anal Calorim 115, 137–144 (2014). https://doi.org/10.1007/s10973-013-3313-y
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DOI: https://doi.org/10.1007/s10973-013-3313-y